Membrane-based separation techniques have been used as an efficient process for analyte separation or enrichment and matrix removal. By coupling these techniques to flow-based analysis, sample preparation and analyte detection can be automated and miniaturized. Different membrane separation techniques are available but the most used in flow analysis are gas diffusion, dialysis, supported liquid membranes and polymer inclusion membranes. The current state of the art of membrane-based separations hyphenated with flow techniques is presented along with a discussion of the applications to environmental and food analysis. Moreover, a brief description of gas diffusion, dialysis and membrane extraction techniques is also included.

基于膜的分离技术已用作分析物分离或富集和基质去除的有效方法。通过将这些技术与基于流量的分析相结合，样品制备和分析物检测可以实现自动化和小型化。可以使用不同的膜分离技术，但在流量分析中最常用的是气体扩散，渗析，负载型液膜和聚合物夹杂膜。介绍了使用流动技术进行连接的基于膜的分离技术的最新状态，并讨论了其在环境和食品分析中的应用。此外，还包括对气体扩散，透析和膜萃取技术的简要说明。